Diabetes Care, Vol 7, Issue 3 207-210, Copyright © 1984 by American Diabetes Association
Effects of a high-starch diet with low or high fiber content on postabsorptive glucose utilization and glucose production in normal subjects
PJ Nestel, C Nolan, J Bazelmans and R Cook
The effects of fiber, added to a high-starch diet, on glucose and insulin
metabolism were studied in seven healthy men in a controlled environment.
Diets rich in starch (carbohydrate provided 62% energy) contained either 16
g or 100 g of fiber from several sources of food and were given for 10-day
periods. Two parameters of glucose control were measured: glucose
metabolism during insulin-glucose infusions (seven subjects) and glucose
production measured by infusing tritiated glucose tracer (five subjects).
Three sets of studies were carried out in the sequence: low-fiber,
high-fiber, low-fiber. The respective mean values (+/- SE) for glucose
utilization were 6.70 +/- 1.4, 7.01 +/- 1.02, and 6.77 +/- 1.34 mg/kg X
min. Analysis of variance failed to show a significant effect of dietary
change. Values for basal glucose production were 2.0 +/- 0.1, 1.9 +/- 0.2,
and 2.4 +/- 0.3 mg/kg X min with the low-fiber, high-fiber, and low-fiber
diets, respectively, which were not significantly different. The one
significant response to the high-fiber diet was a lowering in plasma
cholesterol, the mean values for the seven subjects during the three
periods being 154 +/- 12, 138 +/- 10, and 156 +/- 13 mg/dl (P less than
0.05).